Do I NEVER shut it off…?


Gryphon says in the instruction manual to leave the amp on. (Diablo 300) 

It sounds amazing and never shuts down, but gets almost too hot to touch on certain parts of the side heat syncs. 
Really…? Leave it on all the time…?

What do you guys think…?

Thank you…!
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As I was told by a man with a great ear who owns several amps
including a Pass 250.8. Off, then a  One hour warmup. 

As I was told by another very experienced fellow also with a 
great ear. Keep the DACs on always. SS may take a week to 
fully wake up.

I go with the One hour warmup. Even for the DAC. After all there
must be some advantages to a limited hearing range.

As I was told by another very experienced fellow also with a
great ear. Keep the DACs on always. SS may take a week to
fully wake up.

I don't know about the ears but this one is a great listener. The other one, not so much.

I had the same question for whether to keep my first watt j2 on all the time or no. i posed the same question to Nelson Pass and he said one should keep it off until an hour or so before listening. Keeping it on all the time can reduce its life he said. 
You can leave it on all the time but it is best to shut it off for obvious reasons but for the best sound all the time you need to leave it on.
My Pass Labs XA-25 has not been turned off even once since it was plugged in...except for a couple power outages that lasted a few hours during storms.